10 Best Pool Chemicals 2025 in the United States

The HTH 52037R Pool Care Shock Advanced is a versatile and effective pool chemical designed to address a variety of common pool water issues. Its 4-in-1 formula is a notable strength, as it kills bacteria and algae, reduces chlorine odor and irritation, and restores water clarity quickly. This makes it a convenient option for weekly maintenance, solving most pool water problems within 24 hours, which is ideal for busy pool owners looking for a quick solution.

Additionally, the product is compatible with all types of swimming pools, including vinyl-lined and saltwater systems, providing flexibility for different pool setups. The Cal Hypo formula is efficient at sanitizing the pool without adding cyanuric acid, which helps prevent overstabilization and chlorine lock, a common issue with some other shock treatments.

One potential drawback is that it requires the use of HTH 6-Way Test Strips for optimal results, adding an extra step to the pool care routine. Additionally, while the product is effective, it is also essential to handle it carefully due to its chemical nature. In summary, the HTH 52037R Pool Care Shock Advanced is a strong choice for those looking to maintain a clean and clear pool with minimal hassle, though users should be prepared for regular testing and careful handling.

The HTH 52036R Pool Care Shock is a fast-acting, multi-purpose shock treatment designed to keep your pool water clean and clear. Its 4-in-1 formula targets common pool issues by killing bacteria and algae quickly, reducing chlorine odor and irritation, and restoring sparkling clarity within 24 hours. Because it uses a calcium hypochlorite base without adding cyanuric acid (CYA), it avoids the problem of chlorine lock, which can happen when too much stabilizer builds up. This makes it suitable for all types of pools, including vinyl-lined and saltwater systems.

This product specifically serves as a shock treatment, so it doesn’t balance pH or alkalinity directly; you’ll still need separate chemicals for those measures. It’s recommended to use this alongside test strips to regularly check your pool's water balance.

If you want a reliable and potent shock to maintain clear and sanitized water, especially on a weekly basis, this HTH shock treatment is a solid choice. Just remember to pair it with other pH and alkalinity balancers for complete pool care.

The 'In The Swim 3 Inch Stabilized Chlorine Tablets' are designed to keep your swimming pool clean and clear by effectively removing bacteria, algae, and other contaminants. These tablets contain 99% Trichloro-S-Triazinetrione with 90% stabilized chlorine, ensuring powerful and consistent sanitization.

The slow-dissolving formula provides long-lasting protection, making them ideal for use in floaters or automatic feeders. Additionally, the tablets are UV-protected to resist depletion from harmful sun rays, contributing to their efficiency and longevity.

Users should note that while the product excels in chlorine delivery, it does not address other key pool maintenance needs like pH balancing, alkalinity increaser, calcium hardness, or shock treatments. Therefore, you'll need to complement these tablets with additional products to manage all aspects of pool chemistry effectively. Their non-perishable nature and optimal usage within two years of manufacture add to their appeal. The weight and size of the product might be cumbersome for some users, but the benefits of cleaner, safer water could outweigh these minor inconveniences.